László András Ágoston (born 25 July 1986) is a Hungarian baritone opera singer, cultural manager, the founder of Moltopera, music educator, marketing expert and one of the best-known bloggers in his native country.

Although as an actor his career had a promising start, he had already participated in TV-shows and theatre performances, eventually he chose the genre of opera at the age of 21.

Besides attending the marketing-PR and journalism faculty of Budapest College of Communication and Business László has also received classical vocal training with Lujza H. Németh and music theory with Rita Széll.

After four years of concentrated learning and some successes in smaller singing competitions he got admission to the Franz Liszt Academy of Music for the first try.

[2] He earned good reputation in both institutions receiving the highest state granted scholarship the Fellowship granted by the Republic, winning 1st prize in the Conference of Scientific Students' Associations (TDK) and a special award in the National Conference of Scientific Students' Associations with his research in the field of advertising in music/music in advertising, that topic he became a well-known expert of.

[11] Between 2011 and 2013, he was secretary general of the Jeunesses Musicales Hungary, the Hungarian branch of the largest youth music NGO in the world.

[19][20] Moltopera debuted at the Hungarian State Opera with L'isola disabitata on 23 November 2014, directed by Zsófi Geréb.

Because of the sudden illness of the baritone protagonist, László Ágoston had to save the performance learning the role and the direction in less than 36 hours.

[21] After the successful and critically acclaimed debut of Moltopera (even featured among the best directions of the 2014/2015 season in Hungary),[22] they became regular guest performers in the Hungarian State Opera with a new premiere every year.

He even advertised this post among the followers of Viktor Orbán, and his governing party, the Fidesz, receiving fierce and vulgar criticism.

[34] His opposition to Orban's politics and enthusiastic defence of the human rights made him an often attacked persona in the Hungarian public talk even though he is known for his very calm and modest style.